EP0242692B1 - Liquid-flow meter - Google Patents

Liquid-flow meter Download PDF

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Publication number
EP0242692B1
EP0242692B1 EP19870105101 EP87105101A EP0242692B1 EP 0242692 B1 EP0242692 B1 EP 0242692B1 EP 19870105101 EP19870105101 EP 19870105101 EP 87105101 A EP87105101 A EP 87105101A EP 0242692 B1 EP0242692 B1 EP 0242692B1
Authority
EP
European Patent Office
Prior art keywords
pressure plate
housing
ring
meter
head ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19870105101
Other languages
German (de)
French (fr)
Other versions
EP0242692A1 (en
Inventor
Holger Körner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cambio Ragione Sociale allmess Mess - und Regelger
Original Assignee
ALLMESS MESS- und REGELGERAETE GmbH
Allmess Mess- und Regelgerate GmbH
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Application filed by ALLMESS MESS- und REGELGERAETE GmbH, Allmess Mess- und Regelgerate GmbH filed Critical ALLMESS MESS- und REGELGERAETE GmbH
Priority to AT87105101T priority Critical patent/ATE59471T1/en
Publication of EP0242692A1 publication Critical patent/EP0242692A1/en
Application granted granted Critical
Publication of EP0242692B1 publication Critical patent/EP0242692B1/en
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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/06—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects using rotating vanes with tangential admission
    • G01F1/075—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects using rotating vanes with tangential admission with magnetic or electromagnetic coupling to the indicating device

Definitions

  • the invention relates to a flow meter according to the preamble of claim 1.
  • the pressure plate is a spring plate, which rests on the circumference of a retaining rib plate and is pressed in the direction of the impeller by a plate spring in order to define the bearing play of the impeller axis and the rotational adjustability of the To produce a pressure plate for adjusting the counter.
  • the plate spring is fixed by a snap ring in the housing by inserting the snap ring into a circumferential groove in the housing.
  • the pressure plate is in turn sealed against the housing by an annular seal. Since it is a spring plate, it can absorb pressure surges that either occur in the liquid conveyed by the water meter or are caused by freezing of the water. However, axial positioning of the pressure plate cannot be achieved with the snap ring.
  • the pressure plate can be set in a reproducible manner relative to the housing of the flow meter by means of the head ring in order to fix the axial bearing play of the impeller.
  • the head ring is loosened again by turning it by a certain angle, so that an axial play of the pressure plate of approx. 0.05 mm is achieved and thus a rotation of the pressure plate and thus an adjustment of the counter are possible.
  • the head ring With the O-ring, the head ring is held on the housing during the rotation of the pressure plate, although due to the fact that the pressure plate acts on the head ring, a frictional torque acts on the housing, so that the set axial play of the pressure plate and therefore of the impeller remains unchanged when the pressure plate is turned remains.
  • the O-ring can be used several times; if it is worn out, it can easily be replaced with a new O-ring.
  • the O-ring is preferably made of Perbunan @ or Buna N @ and has a Shore hardness of about 70, which is favorable for the use of the O-ring according to the invention under the present conditions of use.
  • the flow meter shown has a T-shaped housing, to the connection 1 'of which the liquid which flows out of the connection 1 "is supplied. Between the connections 1' and 1", the housing 1 is provided with an open center opening into which a Impeller 7 is used in a manner known per se.
  • the impeller 7 is supported by an impeller axis 6, which is supported at one end on the bottom of the housing 1 and is supported at its other end in a pressure plate 11.
  • the pressure plate 11 lies on an annular shoulder 12 of the housing 1 and is sealed off from the housing 1 by an annular seal 10.
  • the pressure plate 11 is usually made of brass, but it can also consist of plastic. It is fixed in its position by a head ring 14, which is also preferably made of brass.
  • the head ring 14 is provided with an external thread 16 and screwed into a corresponding internal thread of the inner wall of the housing.
  • a circumferential groove 13 is inserted, in which an O-ring 15 is inserted.
  • the O-ring 15 consists of Perbunan 0 or Buna N O and has a Shore hardness of approximately 70.
  • the head ring 14 is thereby secured in the housing by the O-ring 15 twisting the head ring 14 relative to the housing 1 prevented when rotating the pressure plate 11 to adjust the counter. This allows the counter to be adjusted precisely.
  • the head ring 14 has a central opening 17 into which part of a cup-shaped central piece 18 of the pressure plate 11 extends.
  • the shaft 19 of the counter 3 is mounted, which is also rotated by magnetic forces upon rotation of the impeller 7 from its axis 6 in a conventional manner.
  • magnets are provided on the mutually facing ends of the impeller axis 6 and the shaft 19 of the counter 3.
  • a cover 2 covers the counter 3 and is locked to the housing 1, expediently screwed or jammed.
  • the cover 2 is transparent at least in the area of its upper surface in the figure.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)
  • External Artificial Organs (AREA)

Abstract

The meter has an approximately T-shaped housing (1), in which an impeller spindle (6) is separated from a metering mechanism shaft (19) by a pressure plate (11). A head ring (14), screwed into the housing (1), serves the purpose of holding the pressure plate (11) in such a way that the bearing play of the impeller spindle (6) is defined. An O-ring (15), laid between the head ring (14) and the housing (1), serves to prevent the head ring (14) shifting from the set position. <IMAGE>

Description

Die Erfindung betrifft einen Durchflußzähler gemäß Oberbegriff des Patentanspruchs 1.The invention relates to a flow meter according to the preamble of claim 1.

Aus der DE-Gebrauchsmusterschrift 8 236 017 ist bereits ein Wasserzähler bekannt, bei dem die Druckplatte eine Federplatte ist, welche auf dem Umfang einer Staurippenplatte aufliegt und von einer Tellerfeder in Richtung Flügelrad gedrückt wird, um das Lagerspiel der Flügelradachse zu definieren und die Drehverstellbarkeit der Druckplatte zur Justierung des Zählers herzustellen. Die Tellerfeder wird von einem Sprengring im Gehäuse festgesetzt, indem der Sprengring in eine Umfangsnut des Gehäuses eingesetzt ist. Die Druckplatte ist ihrerseits gegenüber dem Gehäuse über eine Ringdichtung abgedichtet. Da sie eine Federplatte ist, kann sie Druckstöße aufnehmen, die entweder in der durch den Wasserzähler geförderten Flüssigkeit auftreten oder durch Einfrieren des Wassers hervorgerufen werden. Mit dem Sprengring läßt sich ein axiales Positionieren der Druckplatte jedoch nicht erreichen.From DE utility model 8 236 017 a water meter is already known, in which the pressure plate is a spring plate, which rests on the circumference of a retaining rib plate and is pressed in the direction of the impeller by a plate spring in order to define the bearing play of the impeller axis and the rotational adjustability of the To produce a pressure plate for adjusting the counter. The plate spring is fixed by a snap ring in the housing by inserting the snap ring into a circumferential groove in the housing. The pressure plate is in turn sealed against the housing by an annular seal. Since it is a spring plate, it can absorb pressure surges that either occur in the liquid conveyed by the water meter or are caused by freezing of the water. However, axial positioning of the pressure plate cannot be achieved with the snap ring.

Aus dem DE-U1 8 221 506 bzw EP-A 0 088 883 ist es unter Ausbildung eines Durchflußzählers der eingangs erwähnten Art bekannt, statt der federnden Druckplatte, der Tellerfeder und des Sprengringes eine starre Druckplatte und einen schraubverstellbaren Kopfring zur Lagesicherung der Druckplatte zu verwenden. Die Druckplatte ist zum Justieren des Zählers drehverstellbar. Zum Justieren wird der Kopfring etwas gelöst, damit sich die Druckplatte drehen läßt. Dadurch ändert sich jedoch auch das axiale Lagerspiel des Flügelrades. Außerdem wird die Druckplatte bei dem Justieren des Zählers durch Drehen der Druckplatte unter dem Innendruck des Prüfmediums (ca. 4 bar) gegen den Kopfring gepreßt, wodurch ein hoher Reibwert entsteht und sich der Kopfring beim Justiervorgang mitdrehen und wegen seiner Schraubverstellbarkeit axial verlagern kann. Hierdurch werden auch die axiale Lage der Druckplatte und damit auch das axiale Lagerspiel für das Flügelrad undefiniert entweder positiv oder negativ verändert.From DE-U1 8 221 506 and EP-A 0 088 883 it is known, with the formation of a flow meter of the type mentioned, to use a rigid pressure plate and a screw-adjustable head ring to secure the position of the pressure plate instead of the resilient pressure plate, the plate spring and the snap ring . The pressure plate can be rotated to adjust the counter. To adjust the head ring is loosened a little so that the pressure plate can be rotated. However, this also changes the axial bearing play of the impeller. In addition, when adjusting the counter, the pressure plate is pressed against the head ring by rotating the pressure plate under the internal pressure of the test medium (approx. 4 bar), which creates a high coefficient of friction and the head ring rotates during the adjustment process and can be axially displaced due to its screw adjustability. As a result, the axial position of the pressure plate and thus the axial bearing play for the impeller are also changed in an undefined manner, either positively or negatively.

Es ist Aufgabe der Erfindung, den Durchflußzähler der eingangs genannten Art dahingehend zu verbessern, daß das axiale Lagerspiel des Flügelrades auch nach dem Justieren des Zählers definiert eingestellt bleibt.It is an object of the invention to improve the flow meter of the type mentioned in such a way that the axial bearing play of the impeller remains defined even after the meter has been adjusted.

Zur Lösung dieser Aufgabe dient ein Durchflußzähler für unter Druck stehende Flüssigkeiten mit einem Anschlüsse (1', 1") für Rohrleitungen aufweisenden Gehäuse (1), in dem ein Flügelrad (7) sowie ein Zählwerk (3) untergebracht sind, zwischen denen eine abdichtende Trennwand in Form einer zum Justieren des Zählers drehverstellbaren Druckplatte (11) liegt, auf der sich das Zählwerk (3) abstützt und durch die hindurch die Flügelradachse (6) und die Welle (19) des Zählwerks (3) miteinander magnetisch gekoppelt sind, und mit einem mit Außengewinde (16) in das Gehäuse (1) einschraubbaren Kopfring (14) als Anschlag für die Druckplatte (11), dadurch gekennzeichnet, daß der das axiale Lagerspiel des Flügelrades (7) bestimmende Kopfring (14) durch einen in eine Umfangsnut (13) eingelegten O-Ring (15) gegenüber dem Gehäuse (1) gegen ein Verdrehen durch das Drehverstellen der Druckplatte (11) gesichert ist.To solve this problem, a flow meter for pressurized liquids with a connections (1 ', 1 ") for piping housing (1), in which an impeller (7) and a counter (3) are housed, between which a sealing Partition in the form of a pressure plate (11) which can be rotated to adjust the counter, on which the counter (3) is supported and through which the impeller axis (6) and the shaft (19) of the counter (3) are magnetically coupled, and With a head ring (14) which can be screwed into the housing (1) with an external thread (16) as a stop for the pressure plate (11), characterized in that the head ring (14) determining the axial bearing play of the impeller (7) is provided by a circumferential groove (13) inserted O-ring (15) against the housing (1) is secured against rotation by rotating the pressure plate (11).

Dadurch kann mittels des Kopfringes die Druckplatte zur Festlegung des axialen Lagerspiels des Flügelrades in reproduzierbarer Weise gegenüber dem Gehäuse des Durchflußzählers eingestellt werden. Hierbei wird der Kopfring nach seinem Festziehen durch Drehung um einen bestimmten Winkel wieder gelöst, so daß ein Axialspiel der Druckplatte von ca. 0,05 mm erreicht wird und so eine Drehung der Druckplatte und damit eine Justierung des Zählers möglich sind. Mit dem O-Ring wird der Kopfring während des Verdrehens der Druckplatte, obwohl dabei aufgrund des Anliegens der Druckplatte am Kopfring ein Reibmoment auf diesen einwirkt, am Gehäuse festgehalten, so daß das eingestellte Axialspiel der Druckplatte und daher des Flügelrades bei dem Verdrehen der Druckplatte unverändert bleibt.As a result, the pressure plate can be set in a reproducible manner relative to the housing of the flow meter by means of the head ring in order to fix the axial bearing play of the impeller. Here, the head ring is loosened again by turning it by a certain angle, so that an axial play of the pressure plate of approx. 0.05 mm is achieved and thus a rotation of the pressure plate and thus an adjustment of the counter are possible. With the O-ring, the head ring is held on the housing during the rotation of the pressure plate, although due to the fact that the pressure plate acts on the head ring, a frictional torque acts on the housing, so that the set axial play of the pressure plate and therefore of the impeller remains unchanged when the pressure plate is turned remains.

Der O-Ring ist mehrfach verwendbar; sollte er verschlissen sein, so kann er ohne Schwierigkeiten gegen einen neuen O-Ring ausgetauscht werden.The O-ring can be used several times; if it is worn out, it can easily be replaced with a new O-ring.

Vorzugsweise besteht der O-Ring aus Perbunan@ oder Buna N@ und hat eine Shore-Härte von etwa 70, was für den erfindungsgemäßen Verwendungszweck des O-Rings unter den vorliegenden Anwendungsbedingungen günstig ist.The O-ring is preferably made of Perbunan @ or Buna N @ and has a Shore hardness of about 70, which is favorable for the use of the O-ring according to the invention under the present conditions of use.

Die Erfindung wird im folgenden anhand eines Ausführungsbeispiels näher erläutert, welches einen Durchflußzähler für unter Druck stehende Flüssigkeiten schematisch im Schnitt zeigt:The invention is explained in more detail below on the basis of an exemplary embodiment which shows a flow meter for liquids under pressure schematically in section:

Der dargestellte Durchflußzähler hat ein T-förmiges Gehäuse, an dessen Anschluß 1' die Flüssigkeit zugeführt wird, die aus dem Anschluß 1" abfließt. Zwischen den Anschlüssen 1' und 1" ist das Gehäuse 1 mit einer oben offenen Mittelöffnung versehen, in die ein Flügelrad 7 in an sich bekannter Weise eingesetzt ist. Das Flügelrad 7 wird von einer Flügelradachse 6 getragen, die sich mit einem Ende am Boden des Gehäuses 1 abstützt und mit ihrem anderen Ende in einer Druckplatte 11 gelagert ist.The flow meter shown has a T-shaped housing, to the connection 1 'of which the liquid which flows out of the connection 1 "is supplied. Between the connections 1' and 1", the housing 1 is provided with an open center opening into which a Impeller 7 is used in a manner known per se. The impeller 7 is supported by an impeller axis 6, which is supported at one end on the bottom of the housing 1 and is supported at its other end in a pressure plate 11.

Die Druckplatte 11 liegt auf einer Ringschulter 12 des Gehäuses 1 und ist gegenüber dem Gehäuse 1 durch eine Ringdichtung 10 abgedichtet. Die Druckplatte 11 besteht üblicherweise aus Messing, sie kann aber auch aus Kunststoff bestehen. Sie wird von einem Kopfring 14, der ebenfalls vorzugsweise aus Messing besteht, in ihrer Lage fixiert. Zu diesem Zweck ist der Kopfring 14 mit einem Außengewinde 16 versehen und in ein entsprechendes Innengewinde der Innenwand des Gehäuses geschraubt. In das Außengewinde 16 ist eine Umfangsnut 13 eingestochen, in die ein O-Ring 15 eingelegt ist. Der O-Ring 15 besteht in einer Ausführungsform aus Perbunan0 oder Buna NO und hat eine Shore-Härte von etwa 70. Dadurch wird der Kopfring 14 im Gehäuse gesichert, indem der O-Ring 15 ein Verdrehen des Kopfringes 14 gegenüber dem Gehäuse 1 beim Verdrehen der Druckplatte 11 zum Justieren des Zählers unterbindet. Dadurch läßt sich der Zähler genau justieren.The pressure plate 11 lies on an annular shoulder 12 of the housing 1 and is sealed off from the housing 1 by an annular seal 10. The pressure plate 11 is usually made of brass, but it can also consist of plastic. It is fixed in its position by a head ring 14, which is also preferably made of brass. For this purpose, the head ring 14 is provided with an external thread 16 and screwed into a corresponding internal thread of the inner wall of the housing. In the external thread 16, a circumferential groove 13 is inserted, in which an O-ring 15 is inserted. In one embodiment, the O-ring 15 consists of Perbunan 0 or Buna N O and has a Shore hardness of approximately 70. The head ring 14 is thereby secured in the housing by the O-ring 15 twisting the head ring 14 relative to the housing 1 prevented when rotating the pressure plate 11 to adjust the counter. This allows the counter to be adjusted precisely.

Der Kopfring 14 besitzt eine Mittelöffnung 17, in die sich ein Teil eines becherförmigen Mittelstücks 18 der Druckplatte 11 erstreckt. In dem becherförmigen Mittelstück 18 der Druckplatte 11 ist die Welle 19 des Zählwerks 3 gelagert, die durch Magnetkräfte bei einer Drehung des Flügelrades 7 von dessen Achse 6 in an sich bekannter Weise ebenfalls in Drehung versetzt wird. Zu diesem Zweck sind an den einander zugewandten Enden der Flügelradachse 6 und der Welle 19 des Zählwerks 3 nicht dargestellte Magnete vorgesehen. Eine Abdeckung 2 überdeckt das Zählwerk 3 und ist mit dem Gehäuse 1 verriegelt, zweckmäßigerweise verschraubt oder verklemmt. Die Abdeckung 2 ist zumindest im Bereich ihrer in der Figur oberen Fläche durchsichtig.The head ring 14 has a central opening 17 into which part of a cup-shaped central piece 18 of the pressure plate 11 extends. In the cup-shaped gene center piece 18 of the pressure plate 11, the shaft 19 of the counter 3 is mounted, which is also rotated by magnetic forces upon rotation of the impeller 7 from its axis 6 in a conventional manner. For this purpose, magnets, not shown, are provided on the mutually facing ends of the impeller axis 6 and the shaft 19 of the counter 3. A cover 2 covers the counter 3 and is locked to the housing 1, expediently screwed or jammed. The cover 2 is transparent at least in the area of its upper surface in the figure.

Claims (2)

1. A flowmeter for pressurised fluids having a housing (1) comprising connections (1', 1") for pipelines, in which a propeller (7) and a meter (3) are housed, between which there is a sealing partition in the form of a rotationally adjustable pressure plate (11) for adjusting the meter, on which the meter (3) is supported and through which the propeller axle (6) and the shaft (19) of the meter (3) are magnetically connected to one another, and having a head ring (14) which can be screwed with an external thread (16) into the housing (1) as a stop for the pressure plate, characterised in that the head ring (14) determining the axial bearing play of the propeller (7) is prevented from rotating as a result of the rotational adjustment of the pressure plate (11) with respect to the housing (1) by an 0 ring (15) inserted in a peripheral groove (13).
2. A flowmeter according to claim 1, characterised in that the O ring (15) has a Shore hardness of 70.
EP19870105101 1986-04-21 1987-04-07 Liquid-flow meter Expired - Lifetime EP0242692B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87105101T ATE59471T1 (en) 1986-04-21 1987-04-07 LIQUID COUNTER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8611134U DE8611134U1 (en) 1986-04-21 1986-04-21 Liquid meter
DE8611134U 1986-04-21

Publications (2)

Publication Number Publication Date
EP0242692A1 EP0242692A1 (en) 1987-10-28
EP0242692B1 true EP0242692B1 (en) 1990-12-27

Family

ID=6793986

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870105101 Expired - Lifetime EP0242692B1 (en) 1986-04-21 1987-04-07 Liquid-flow meter

Country Status (4)

Country Link
EP (1) EP0242692B1 (en)
AT (1) ATE59471T1 (en)
DE (2) DE8611134U1 (en)
GR (1) GR3001534T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4128448A1 (en) * 1991-08-28 1993-03-04 Bosch Gmbh Robert HOUSING FOR A AIR MEASURING METER

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4391139A (en) * 1982-02-24 1983-07-05 Rockwell International Corporation Plastic water meter main case
DE8236017U1 (en) * 1982-12-22 1984-01-05 Develconter R. & D. Ltd., London WATER METER

Also Published As

Publication number Publication date
DE3767010D1 (en) 1991-02-07
GR3001534T3 (en) 1992-11-23
DE8611134U1 (en) 1986-07-03
EP0242692A1 (en) 1987-10-28
ATE59471T1 (en) 1991-01-15

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